Amine− and Phosphine−Borane Adducts: New Interest in Old Molecules

Coordination chemistry of the main group elements with phosphine, arsine and stibine ligands

“…Their chemistry was often included in reviews on transition metal complexes ( [10] and refs therein), and the earlier work on Hg is detailed in reviews of the coordination and structural chemistry of the element [28,29]. However, since the M(II) complexes contain d 10 metal centres they also fit within the scope of the present article, and since no recent reviews exist, they are discussed below.…”

“…Group 12 complexes have sometimes been included in reviews of transition metal phosphines [9] and refs therein. Phosphine boranes have been reviewed twice in the recent past [10,11] and thus are not included in the present article. A number of weak adducts between PH 3 or PMe 3 and p-block Lewis acids formed at low temperatures and characterised using matrix isolation techniques have been discussed in a very recent comprehensive review of the field [12].…”

The Simplest Amino‐borane H2B=NH2 Trapped on a Rhodium Dimer: Pre‐Catalysts for Amine–Borane Dehydropolymerization

“…They are formed by the dehydropolymerization of amine‐boranes (H 3 B⋅NRH 2 ; R=H or Me, for example; Scheme 1 A),1 and metal‐catalyzed routes to polyamino‐boranes offer the potential for fine control over molecular weight and polymer stereochemistry. There is recent evidence that these processes occur at a metal center in which the catalyst needs to perform two roles: 1) formal dehydrogenation of amine‐borane to form a latent source of amino‐borane (H 2 B=NRH), and 2) subsequent B−N bond formation 2, 3, 4, 5, 6.…”

Synthesis and Molecular Structure of 2-(Diphenylphosphano)phenyl Benzoate Borane Adduct

“…To modify the appropriate acid residue it is sometimes necessary to block the phosphorus atom, especially, when working with alkylating agents which can lead to phosphonium salts or under oxidative conditions. Borane (BH3) is commonly used as protecting group and forms a stable air-resistant Lewis acid-base pair with the phosphane to prevent the aforementioned side reactions [6].…”